低压 GaN FET 可实现更小、冷却要求最小化和效率更高的解决方案

与采用传统的硅基功率 MOSFET的应用相比，低压 GaN FET（即 100 V）可实现更小，冷却要求最小化和效率更高的解决方案。 本文讨论了氮化镓器件如何应对动态性能需要重复且可靠的表征的挑战。 定制氮化镓夹具和测试板的机械和电气设计仔细、周全，就可以克服其中许多挑战，使您能够在设计功率转换器时，自信地使用这些新型宽能隙器件。

Power Electronics News
2023年7月
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This paper deals with the application of the latest generation low voltage (up to 80 V) Gallium Nitride (GaN) devices for motor drive applications in the field of electric micro-mobility. A two-level inverter topology oriented to light electric traction (such as electric scooters) with a power rate of 1500 W has been considered. An experimental board using two GaN FETs in parallel connection for each switch of an inverter leg has been arranged. The intrinsic parameters spread of the device, as well as the leakage inductances of both the circuit and the PCB, to evaluate the impact on the current share during both the transient phase and in the steady state have been investigated. In the paper, several simulation runs have been carried out and described. Furthermore, the inverter experimental board has been used to evaluate the phase voltages and currents at different load conditions. Finally, the temperature limits versus phase current variation have been evaluated.

IEEE 2022 AEIT International Annual Conference (AEIT)
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